Diff for "DailyReports7"

Back to the NIKA run 7

January 14th 2014

Andrea Catalano come to the 30m to turn on the NIKA cryostat and checking the cool down remotely controlled from Grenoble (Alain Benoit, Alessandro Monfardini and Martino Calvo).

STATUS OF THE INSTRUMENT

9h30: Reboot of the PC NIKA and change the VNC forwarding on the router.

10h: Pumped the trap (J5=46mbar). Pumped the dilution circuit (until Jpi=3e-2mbar).

11h: Pressions stables. ZERO OF J1 IS -25mbar!!!

12h: Connected the leak detector. Residual pressure in the cryostat 6.6mbar.

12h15m: Optical alignment of the cryostat started.

12h30m: Impedance 18mbar/min at 3bar. It is maybe less w.r.t. the last run cryo (not clear from the old files). WE CONTINUE.

13h: Leak test: OK, in the 1e-9 range.Pumped ev18 for 15 minutes. It was well empty in any case. REMEMBER NOT TO TOUCH ev18 ANYMORE.

13h: Optical alignment OK.

14h: GREEN LIGHT for switching on the Pulse Tube. Mixture circulated for two hours at 3bar.

14h30m: Pulse Tube on with 900mbar.

15h30m: Lowering to 870mbar. Keep the same during the night.

23h10m: T4K=160K. Tstill=125K. Lowering the flux at 630mbar for the night.

January 15th 2014

Cooling down still going on.

STATUS OF THE INSTRUMENT

07h00m: T4K=25K. Tstill=30K. Lowering the flux at 340mbar.

09h15m: Close ev5.

10h30m: Coax connected, mppsync connected, computers on (archeops 8-9-10) in the control room

11h00m: Condensation starts.

16h00m: 100mK !!!.

17h45m: Stop Compressor

18h30m: Stop leak detecotr.

18h30m: Nitrogen refill.

18h30m: HWP modulator connected.

January 16th 2014

STATUS OF THE INSTRUMENT

08h30m: T_BM=96mK pretty stable (DeltaT_BM about 1mK over 12h), T_still=682mK (DeltaT_still about 5mK over 1h), T_4K=5.23K (DeltaT_4K about 20mK over 1h), J4 stable at 580mbar.

21h30m: T_BM=95.8mK pretty stable (DeltaT_BM about 1mK over 12h), T_still=685mK (DeltaT_still about 7mK over 1h), T_4K=5.2K (DeltaT_4K about 20mK over 1h), J4 stable at 550mbar.

January 17th 2014

Nicolas joins the Telescope at 10am. Preparing tomorrow observations (pako, pipeline, etc...)

STATUS OF THE INSTRUMENT

08h30m: T_BM=95mK pretty stable (DeltaT_BM about 1mK over 12h), T_still=655mK (DeltaT_still about 6mK over 1h), T_4K=4.91K (DeltaT_4K about 80mK over 1h), J4 stable at 537mbar.

11h30m: All the scripts pako and the NIKA catalogue copied in the new account nikaw-13 (to be used for the poll).

14h30m: Refill Nitrogen in the trap done.

14h30m: Problems to connect to the mppsync. Maybe memory card burnt?

20h20m: T_BM=94.7mK pretty stable (DeltaT_BM about 0.5mK over 12h), T_still=650mK (DeltaT_still about 3mK over 1h), T_4K=4.88K (DeltaT_4K about 10mK over 1h), J4 stable at 530mbar.

January 18th 2014

Alain and Alessandro join the telescope skiing in the blizzard!

STATUS OF THE INSTRUMENT

07h50m: T_BM=94.5mK pretty stable (DeltaT_BM about 0.6mK over 12h), T_still=655mK (DeltaT_still about 5mK over 1h), T_4K=4.89K (DeltaT_4K about 8mK over 1h), J4 stable at 535mbar.

09h30m: mppsync connection problems repaired by changing the memory card.